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authorTakashi Iwai <tiwai@suse.de>2012-11-08 15:58:25 +0100
committerTakashi Iwai <tiwai@suse.de>2012-11-08 15:58:25 +0100
commit17a4adbe68c8e6c1fde8decb2345dc4acea87934 (patch)
tree16d772ee8b5904ad9b92e1514e131bc504a079ae /sound/usb
parentc9adeefda0e29bed628e40e7f9da1f84243937e7 (diff)
parent8bb4d9ce08b0a92ca174e41d92c180328f86173f (diff)
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Merge branch 'for-linus' into for-next
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/endpoint.c13
-rw-r--r--sound/usb/endpoint.h1
-rw-r--r--sound/usb/pcm.c3
3 files changed, 17 insertions, 0 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 7f78c6d782b0..34de6f2faf61 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -35,6 +35,7 @@
#define EP_FLAG_ACTIVATED 0
#define EP_FLAG_RUNNING 1
+#define EP_FLAG_STOPPING 2
/*
* snd_usb_endpoint is a model that abstracts everything related to an
@@ -502,10 +503,20 @@ static int wait_clear_urbs(struct snd_usb_endpoint *ep)
if (alive)
snd_printk(KERN_ERR "timeout: still %d active urbs on EP #%x\n",
alive, ep->ep_num);
+ clear_bit(EP_FLAG_STOPPING, &ep->flags);
return 0;
}
+/* sync the pending stop operation;
+ * this function itself doesn't trigger the stop operation
+ */
+void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep)
+{
+ if (ep && test_bit(EP_FLAG_STOPPING, &ep->flags))
+ wait_clear_urbs(ep);
+}
+
/*
* unlink active urbs.
*/
@@ -918,6 +929,8 @@ void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep,
if (wait)
wait_clear_urbs(ep);
+ else
+ set_bit(EP_FLAG_STOPPING, &ep->flags);
}
}
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index 6376ccf10fd4..3d4c9705041f 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -19,6 +19,7 @@ int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
int snd_usb_endpoint_start(struct snd_usb_endpoint *ep, int can_sleep);
void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep,
int force, int can_sleep, int wait);
+void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
int snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
void snd_usb_endpoint_free(struct list_head *head);
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 8ca6edf29fee..e7329d0449f2 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -565,6 +565,9 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
goto unlock;
}
+ snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
+ snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+
ret = set_format(subs, subs->cur_audiofmt);
if (ret < 0)
goto unlock;